walker



(No Model.) Sheets-Sheet 1.

v 2 T. WALKER ,& J. P; CARTER.

ORB ROASTINGFURNAGE.

'No. 516,854. Patent-ed Mar. 20, 1894.

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UNIT D STATES PATENT OFFICE.

THOMAS WALKER AND JOHN F. CARTER, OF PHILADELPHIA, PENNSYLV A- NIA, ASSIGNORS TO JOHN A. BARHAM AND JOSEPH A. VINCENT, OF SAME PLACE.

ORE-ROASTING FURNACE.

SPECIFICATION forming part of Letters Patent No. 516,854, dated March 20, 1894.

Application filed May 23, 1893. Serial No- (N model-l To all whom it may concern.-

Be it known that we, THOMAS WALKER and JOHN F. CARTER, both citizens of the United States, and residents of Philadelphia, Pennsylvania, have invented certain Improvements in Ore-Roasting Furnaces, of which the following is a specification.

The object of our invention is to construct an ore roasting furnace in such a manner that [O the ore under treatment will flow from one retort to the other by gravity, and the fumes will readily escape without passing through the body of ore, and in which the products of combustion will pass from one chamber to another, and heat the retorts to the proper degree. Our invention is a modification of.

that described and claimed in the application filed by us on the 14th of December, 1892, Serial No. 455,165. v

Referring to the accompanying drawings: Figure 1, is a front view of the furnace. Fig. 2, is a sectional'plan view on the line 1-2, Fig. 3. Fig. 3, is a sectional elevation on the line 3-4., Fig. 2. Fig. 4, is a section on the line 56, Fig. 2. Fig. 5 is a view of one of the adjustable bearings.

A is the body of the furnace; B the retorts mounted on the walls of the furnace and resting in independent chambers G. The retorts e are arranged on an incline side by side so that the ore will flow from one retort to the retort below it by gravity. Each chamber C is divided by a longitudinal partition a, and passages a form communication between the 3 5 upper portion of one chamber with the lower portion of the one beyond it as clearly shown in Fig. 3, and as the fire box E is situated under the lower retort, its products of combustion pass under and over the several retorts 40 until they pass out finallythrough the passage e. We have shown stacks e communieating with the several cross passages 0. These stacks have suitable valves 6 so that they can be closed or opened as required, to

5 out off one or more of the retorts from the heat.

In each retort is mounteda shaftD having blades (1 arranged in two rows in the present instance; each shaft has an arm at one end connected to a rod to which reciprocating mitted to the several retorts through air -move the ore laterally in the retorts but feed the ore forward through the retort. The inclined passage G is'formed in a casing G at each end of the furnace. The ore is fed in one direction through one retort, passes down the inclined passage G, and thenis fedinthe opposite direction through a second retort down the inclined passage at the opposite end of the furnace into the third retort, and then fed forward through the said retort to a third inclinedpassage into the lowermost retort, and from there it is carried to the outlet. The fumes as they arise from the ore pass-through the upper portions of the several retorts andthrough the upper portions of the passages to the flue 2'. Air can be adc valves 2''. Independent fume flues may com- 7 municate with each retort if desired. By the arrangement above described, the several retorts are independently mounted in separate chambers, and one retort can be detached and removed from the furnace without interfering with the other retorts. The bearings F for the shafts are supported by suitable steps as shown in Fig.1,and can be adjusted thereon to properly align the shafts in the retorts, as shown in Fig. 5. By the arrangement of parts as shown, We avoid the complicated passages for the fiow of the ore from one retort to the other, and also avoid the use of mechanical appliances for conveying the ore from one retort to another.

We claim as our invention- 1. The combination in an ore roasting furnace, of the body of the furnace, combustion chamber therein, with a series of retorts arranged on an incline side by side in the combustion chamber, inclined fume passages al-- ternately arranged at each end or the furnace forming communications between the retorts, inclined planes in the passages for the ore 5 and mechanism for feeding the ore through the retorts so that the ore will be fed mechanically therethrough, and flow by gravity from one retort to the retort belowitwithout dusting, substantially as described.

2. The combination in an ore roasting furnace, of the body of the furnace, combustion chamber therein, with a series of retorts arranged on an incline side by side in the combustion chamber, each retort in a separate chamber, passages forming communication with the several chambers, inclined fume passages alternately arranged at each end of the furnace forming communications between the retorts, inclined planes therein for the ore and mechanism for feeding the ore through the retorts so thatthe ore will be fed mechanically therethrough and flow by gravity from one retort to the retort below it without dusting, substantially as described.

3. The combination in an ore roasting f urnace, of the body portion having within it a series of combustion chambers, communicating with each other, said chambers being arranged on an incline side by side, a fire box communicating with the lowest chamber, and

a stack communicating with the upper cham- Witnesses to the signature of John F. Carter:

JOSEPH I-I. KLEIN, HENRY I-IoWsoN. 

